本SAE航空航天标准（AS）旨在标准化与符合AS5385C（TSO C-172）要求的经批准约束带一起使用的“挡货器”货物系紧附件的基本设计、性能和测试要求。由于缺乏商定的行业标准，导致其操作能力存在不确定性，因此认为应规定适用的设计、最低性能和测试要求，因为阻货器是货物系紧装置的一部分，必须满足监管适航要求。

The purpose of this SAE Aerospace Standard (AS) is to standardize the basic design, performance, and testing requirements for "Cargo Stoppers" cargo tie-down accessories to be used in conjunction with approved restraint straps meeting AS5385C (TSO C-172) requirements.The lack of an agreed industry standard resulted in uncertainties about their operational capabilities so that it was deemed advisable to specify the applicable design, minimum performance, and testing requirements, since Cargo Stoppers are used as part of cargo tie-down arrangements that must meet regulatory airworthiness requirements.